Dexcom (DXCM) Seasonality
Recurring seasonal patterns for DXCM — the calendar windows where Dexcom has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
DXCM seasonality at a glance
Over the last 10 years, DXCM's strongest seasonal window has been Nov 2 – Nov 12: it ended higher in 10 of 10 years (100% win rate) with an average return of +6.53% across a 10-day hold. On the weak side, DXCM has historically declined between Sep 2 – Oct 2, falling in 9 of 10 years (average -9.66%).
In total, our analysis finds 814 recurring seasonal windows for Dexcom — 586 bullish and 228 bearish. The next high-win-rate window, Sep 14 – Oct 4, opens in 3 days. These figures describe historical behaviour only — not a forecast.
DXCM's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 17d ago | Jul 26 – Aug 25 | 30d | +6.04% | 80% | +24.63% |
| Completedended 21d ago | Aug 11 – Aug 21 | 10d | +3.50% | 80% | +3.14% |
| Upcomingin 3d | Sep 14 – Oct 4 | 20d | -7.96% | 80% | — |
| Upcomingin 4d | Sep 15 – Oct 5 | 20d | -7.57% | 80% | — |
| Upcomingin 5d | Sep 16 – Oct 6 | 20d | -7.96% | 80% | — |
| Upcomingin 7d | Sep 18 – Oct 8 | 20d | -7.39% | 90% | — |
| Upcomingin 8d | Sep 19 – Sep 29 | 10d | -5.18% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore DXCM seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
DXCM seasonality FAQ
What has historically been the best month to buy DXCM stock?
Based on the last 10 years of price data, DXCM's strongest seasonal window starts in November: Nov 2 to Nov 12, which ended higher in 10 of 10 years (100% win rate) with an average return of +6.53%. Past seasonal patterns do not guarantee future performance.
What is DXCM's strongest seasonal pattern?
DXCM's highest-win-rate pattern in our data is the Nov 2 – Nov 12 window (10-day hold): up in 10 of the last 10 years with an average move of +6.53%.
When has DXCM historically performed worst?
DXCM's weakest recurring window has been Sep 2 to Oct 2, declining in 9 of 10 years with an average return of -9.66%.
How reliable are DXCM's seasonal patterns?
Each DXCM pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. DXCM currently shows 814 recurring windows (586 bullish, 228 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is DXCM stock seasonality?
Seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Dexcom's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where DXCM has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.